Pulverizing-mill.



J. H. KELLY. PULVBRIZING MILL. APPLICATION FILED SEPT. 30', 1912.

1,083,283. Patentd Jan.6, 1914.

2 SHEETS-SHEET 1.

J. H. KELLY. P ULVERIZING MILL. APPLICATION FILED SEPT. ao, 1912.

1,083,283. l Patented .111116, 1914.

2 SHEETS-SHEET 2.

mounted in suitable bearings 4.

UNITED STATES PATENT oEEIoE. rens a. Kerry, or SAN ramas-c6, @amounts ruLvnRrzirie-rrrtr.. I

'specification of Letters rate'nt. Application* led September 3'0, 1912. Serial IiTo.` 723,027.

Patented Jan'. 6, 19M.

To all 'whom it may concern.'

Be it known that LJHN H.l KELL-Y, a

citizen of the United States, Vresiding in the.

city and county of San Francisco and State of California, have invented certaln new and vuseful Improvements in Pulverizing,

Mills, of which the following is arspecilication. .Y

My invention relates to' the-class of pulverizing or crushing mills.

The object of my invention is to provide a .simple land effective mill of this class; and

to this end my invention consists in" the novel p ulverizing or crushing mill,- and in the construction, arrangement and combination of its parts, which I shall hereinafter describe, by reference to the accompanying drawings, in which-f I Figure lis an elevationof my mill. Fig. 2 is a vertical section of the same.

^1 are foundation timbers which supp'o'rt the bed 2 which th'e lmain shaft 3 1s 5 is the body-casting bolted at 6 to the bed, with a plate 7 intervening, said plate having the babbitted bearing 8v for the central shaft 9 which is driven by the bevel gear 1'0 on its lower end and the bevel gear 11 on the main shaft 3.

The upper end of the body-casting 5 is formed with an alular passage- 12,- traversed by webs' or ribs 13", at intervals,- said ribs being tapered upward to an apex as is indicated by the shade lines in- Fig. 2. The base or lower side of thfe passage 12 opens directly into a pair of oppositely disposed i surfa ce\with. the removable crushing shoe 18, the face of. whichmay be' plain or, as here indicated,l it may be ribbed or roughened in any suitable manner. The upper portion of the cap 15is` outwardly dared to form the hopper 1 9.-

The top of the'body-castin'glinside the annular passage 12 is formed with a shelf 20 upon which. is seated the' fixed. supporting plate '.21 which has acentral which the central shaft 9 is mounted. This of the body-casting 5` is `bearing '22 iinplete has a racefway 23 in which are balls 24, andupon these balls through a race-way 25 is carried the muller-operating plate 26,y which is fast upon the upper endof the shaft 9 and is rotated by said shaft.

The bearing faces of the fed supporting plate 21 and the rotating plate 26 are parallel, but the' upper or functional face of the muller-operating plate 26 is inclined to the axis of the plates rotation, as is shown in Fig. 2. In this inclined upper face isv a raceway 27 rn which are balls 28.v

29 1s the muller. It is in its best form a kconical piece, with a race-way 30 in its base,

and a peripheral lip Sladapting it to close down' over the top of th'einner wall o'f the body passaofe 12. This muller is a free one, and rests freely upon' the balls 28 of the muller-operating plate 26 ;y it is not otherwise connected with saidplate, nor with the body casting, as' it Vsimply rests inl place by its own weight. The outer or functional face of the muller is provided with a removable crushing diev 32, thev surface of which may be plain, Aor as i's indicated in Fig. 2, it may be ribbed, toothed or otherlwi-seindentedp Between the sh'oe 18 of the cap lland the die 32 of the muller 29 formed the crushing space or 'a'rea 33 which on accountof the different angles of the j parts is wider above than below, as is usual I with such spaces. As the shoe and die wear,

compensation is had by means of shims 34 placed between the cap and the body-castin Y n operationl the material is fed to thehopper, 1 9 and is crushed in its passage `throughthe space 33, between the shoe 1'8 `and die 32, and thence drops into the an-y nularpassage12, being well directed and distributed bythe tapered ribs'l therein,

and discharged freely and without clo ging into the chutes 14. The crushinl is e e'cted by the movement of the free mu ler 29 relatively to the lcrushing cap 15. It will be seen` that on account of the inclination of the upper face' of the muller-operating lplate 26 to the axis of rotation of saidplate, said muller freely resting upolithis inclined face,

1s subjectedA to a circumferenti'ally traveling.v

wave-like movement so ,that each radial plane in the entire circumference of the muller experiences successively a moving wavecrest under which it approaches` the opposing: c'zrushin-Jg'v surface of thecap, thereby grinding andypulverizingthe material, andV upon its The mullery is entirely free with receive' from its ball bearing contact with .its operating plate,

and on the other hand if the mill be fed to its capacity, the biting or crushing function ofu the muller upon the material will so overcome the ball bearing friction that the muller will not turn on its axis at all but will-have only its traveling Wave like Amovement by reason of which it crushes, grinds and pulverizes. ,Between' these extremes, the muller may turnon its axis more or less, but this, if it play' any part at all, is beneficial in assisting the grinding. Also the freedom of the muller is of advan-l tage in yielding to undue stresses.

Ready access may be had to the interior of the mill for cleaning it or repairing, ad-

justing `or renewing its parts. The cap may be thrown back on its hinge, as shown y by the dotted lines in Fig. 1, in order t`o expose the muller. The muller may be lifted out and all the operating parts in its vicinity may be reached with ease.

The object in having the separate plate 7 between the bed 2 and the body casting 5 i's that' it may carry the bearing 8, they babbitt in wh'ch may be renewed easily by 4simply/'removing said plate with its bear- I claim 1. In a pulverizing mill, the combination 'f 'of a rotatable shaft, a muller-operating plate rotated by said shaft and having its functional face inclined toK its axis o rotation; a free conical crushing muller' independent of the said shaft and plate, and disposed with its base in free bearing relation to the inclined face of the plate; land a conical crushing cap inclosinglthe muller with a crushing space between their functional faces.

2. In a pulverizingmlll, the combination Yof a rotatable shaft; a muller-operatingv plate rotated by said shaft and having its functional face inclined 'to its axis of rotation; a free comcal crushing muller'findependent` of said shaft and plate; an antifriction free vbearing" between the inclined face of the plate and the base of the muller; and a conical crushing cap inclosing the muller with a crushing space'between their functional faces.

3. In a pulverizing mill, the combination of a. fixed supportingplate;arotatable` by 'the bau the want of-tit, for

shaft; a muller-operating plate rotated by said shaft and bearing against the supporting plate, said muller-operating plate having its functional face inclined to its axis of rotation; a free crushing muller independent of said rotatable shaft and plate; a free bearing between the back ofthe muller and the inclined face of the rotatable plate; and

a 'crushing wall opposing the crushing-face of the muller, 5

4. In' a pulverizing mill, the combination of a body-casting; a supportingplate fixed in the upper end of the body-casting; a rotatable muller-operating plate having its functional face inclined to its axis of rotation; a free-bearing between the two plates; a free muller; a free bearing between the base ofthe muller and theinclined face of the rotatable plate and a crushing cap secured to the body-casting with its crushing face opposed to the crushing face of the muller. l

5.' In a pulverizing mill, the combination of a body-casting; a central shaft therein with means to drive it; a supporting plate fixed in the upper'end ofthe body castin and vhaving a bearing in which the centra shaft is journaled; a muller-operating plate secured upon-the upper end of the shaft,

said plate having its upper'face inclined'to its axis of rotation; a bearing between the upper face lower facey of the muller-operatlng plate; a free muller.; abearing between the base of the muller.. and the inclined' lface of the muller-operating late; ,and a crushing .cap securedto the bo y-casting with its crushing face opposed to the crushing. face .if the muller. I v

6. In a pulverizing-mill, the combination .of a body-castinghaving at its upper end an annular passage; discharge lchutes communicating with the lower side of said passage; a central yshaft in the body-casting with means toy drive it; a Isupporting plate Lfixed in the upper end of the body casting,

said plate having a bearing for the eentral-shaft; a muller-operating late secured upon'the upper end of the sha t,'said plate having its upperface inclined to its axis of rotation; af bearing betweenthe lupper of the supporting plate and the face offthe supporting plate and the lower faceof the muller-operating plate; a free conical muller; a bearing between the base ofthe muller andthe inclined face of the muller operating plate; and a conical crushing cap secur space communicating below with the upper .side of the annular passage in the body-cast- 111erv 4 l l 7. In apulverizin mill, the combination of, aA bed; ajbody-cast1ng having at its upper end anfa'nnular'I passage; a removablepplate 'to the body-casting withy v its crushing face separated'gfrom the crush- I.ing'faceof the muller to leave a crushing secured between the lower end' of the bodycasting and the bed, said plate having a central bearing; discharge chutes communi'- cating with the lower side of the annularpassage of the bodycastng;`a horizontal main shaft jouraled in the bed; a vertical central shaft journaled inthe bearing'of the removable plate; gears .by which said vertical shaft is driven from the main shaft; a supporting plate fixed in the upper end of the body-casting, said plate having a bearing for the central shaft; a muller-operating plate secured upon the upper end of the central shaft, said plate having its upper face inclined to its axls of rotation; a bearing between the upper face of the supporting plate and the lower face of the muller-operating plate; a free conical mul- 1er; a bearing between the base of the muller and the inclined face of the muller operating plate; and a conical crushing cap secured to the body-casting with its crushing face separated from the crushing face of the. muller to leave a crushing space communicating below with the upper side of the annular passage in the body-casting. v

- In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN H. KELLY. Witnesses: i

WM. F. Boo'rn, D. B. RICHARDS. 

